CVE-2021-3468 · cross-distro fix matrix

CVE-2021-3468: A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is t

Affects 8 Linux releases across 8 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-3468 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

avahi→ fixed in0.8-5+deb11u2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y avahi
```

Debian bookworm

Source: Debian Security Tracker

avahi→ fixed in0.8-7urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y avahi
```

Debian trixie

Source: Debian Security Tracker

avahi→ fixed in0.8-7urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y avahi
```

Alpine v3.20

Source: Alpine secdb

avahi→ fixed in0.8-r4
```
apk update && apk add --upgrade avahi
```

Alpine v3.21

Source: Alpine secdb

avahi→ fixed in0.8-r4
```
apk update && apk add --upgrade avahi
```

Alpine edge

Source: Alpine secdb

avahi→ fixed in0.8-r4
```
apk update && apk add --upgrade avahi
```

Alpine v3.18

Source: Alpine secdb

avahi→ fixed in0.8-r4
```
apk update && apk add --upgrade avahi
```

Alpine v3.19

Source: Alpine secdb

avahi→ fixed in0.8-r4
```
apk update && apk add --upgrade avahi
```

Are YOU affected by CVE-2021-3468?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

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